This has come up a few times for PyCon, but we get a very wide range of proposal qualities from a wide range of people that would make it hard to come up with the best schedule we can, which is the ultimate goal of the Program Committee. Some of the best speakers submit relatively poor proposals if you read them without their name and experience. Those things obviously aren't everything, but they do hold some weight in the review process.

Anyway, we ended up with 20% women on the schedule, up from 6% in 2012. We did it purely through outreach.